You need a BB data plan to get the service books for WiFi as well as all the other RIM related services. As it is, all you have is phone and SMS.
What do I need a Data Plan for? - BlackBerryFAQ
As for checking, I explained what you need to do. Since your carrier does not support the BB, then there is not much else to do.
BUT, IMHO, return the device and get your money back. You are asking for trouble and problems by keeping it.